CFrame: Check borderless fullscreen setting before enabling exclusive fullscreen in the video config.

Fixes a bug where "Use Fullscreen" would initialize into exclusive fullscreen regardless of the borderless fullscreen setting.

Also relieves the need for the video renderer to check the borderless fullscreen setting each time.

Source/Core/DolphinWX/Frame.cpp

@@ -1244,7 +1244,8 @@ void CFrame::DoFullscreen(bool enable_fullscreen)
 		m_RenderFrame->Raise();
 	}
 
-	g_Config.bFullscreen = enable_fullscreen;
+	g_Config.bFullscreen = (g_Config.bBorderlessFullscreen ||
+		SConfig::GetInstance().m_LocalCoreStartupParameter.bRenderToMain) ? false : enable_fullscreen;
 }
 
 const CGameListCtrl *CFrame::GetGameListCtrl() const

Source/Core/VideoBackends/D3D/Render.cpp

@@ -939,7 +939,7 @@ void Renderer::SwapImpl(u32 xfbAddr, u32 fbWidth, u32 fbHeight,const EFBRectangl
 	SetWindowSize(fbWidth, fbHeight);
 
 	const bool windowResized = CheckForResize();
-	const bool fullscreen = g_ActiveConfig.ExclusiveFullscreenEnabled() &&
+	const bool fullscreen = g_ActiveConfig.bFullscreen &&
 		!SConfig::GetInstance().m_LocalCoreStartupParameter.bRenderToMain;
 
 	bool fullscreen_changed = s_last_fullscreen_mode != fullscreen;

Source/Core/VideoCommon/VideoConfig.h

@@ -152,7 +152,6 @@ struct VideoConfig final
 	bool VirtualXFBEnabled() const { return bUseXFB && !bUseRealXFB; }
 	bool EFBCopiesToTextureEnabled() const { return bEFBCopyEnable && bCopyEFBToTexture; }
 	bool EFBCopiesToRamEnabled() const { return bEFBCopyEnable && !bCopyEFBToTexture; }
-	bool ExclusiveFullscreenEnabled() const { return bFullscreen && !bBorderlessFullscreen; }
 };
 
 extern VideoConfig g_Config;